Firewall
From DD-WRT Wiki
- DD-WRT Firewall Example
- iptables commands (written for DD-WRT)
External links
- Firewall Very short: Purpose and processes.
- sns.ias.edu: Iptables
- IPTABLES - An Overview
- Kernel space structure - simple packet journey through kernel - please note that the left and right at respectively some (might be through a vlan) network ports (wireless og wired) input and output.
- IPTABLES - An Overview
- wikipedia:Netfilter
- interhack.net: Internet Firewalls: Frequently Asked Questions Good.
- Web archive backup (be patient): Kernel Packet Traveling Diagram Quote: "...On the LARTC mailing list, there was a long discussion about how a packet is handled by the kernel. Finally, there was a post by Leonardo Balliache that I copied onto this page. I hope this helps people to better understand how it all works....", Good ASCII drawing of the ethernet/ip packet journey through the Linux Kernel. Simplify the drawing for yourself, if you do not use some of the processes.
- Another good drawing of the ethernet/ip packet journey through the Linux Kernel with some actions written
- Iptables-tutorial - e.g. on-line:
- Iptables Tutorial, Oskar Andreasson Good and very thorough.
- Ipsysctl-tutorial - e.g. on-line:
- Ipsysctl tutorial, Oskar Andreasson, Good and very thorough.
- sans.org: SANS InfoSec Reading Room - Firewalls & Perimeter Protection notably:
- My Firewall Page - "A Firewall is a concept..." Quote: "...Generic Packet-Filter Ruleset...Keep in mind that these hints are for a single workstation-computer connected to the Internet..."
- Firewall Knowledgebase notably:
- DD-WRT Specific IPTables Info
- OpenWRT Advanced Firewall